Todd Siegel, Product Evangelist at Proto.io, talked about how learning how to build an app is a process that requires careful planning, with many things needing to be considered. Designing touchscreen apps ultimately demands prototypes that feel real. Despite this, when aiming for a gesture-driven app with interactive animation, we often couch our design thinking in static design tools. Shouldn't we base our explorations in an interactive animation tool? Proto.io serves as several visual prototyping tools in one. You can import comps to link into flows, and asset layers to animate. But you can also author assets in high enough fidelity on the fly, and customise native component libraries for iOS, watchOS and Material Design.